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Упит dcterms_subject_txt:kinematic analyses

259 items

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... providing relevant information about the availability of machines a significant amount of additional data and information should be included in analyses and processed. These data and information are very heterogeneous and include descriptions of failures, maintenance procedures, logistics’ issues ...
    ... reliability engineering, International Journal of Approximate Reasoning, Vol. 100, Pages 29-55, 2018. [8] Wang, J., Yang, J.B., Sen, P. Safety analyses and synthesis using fuzzy sets and evidential reasoning. Reliability Engineering and System Safety, 47(2), 103-118, 1995. [9] Ignjatovic, D., ...

  • Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study HPP

    Igor Jemcov, Maja Todorović, Aleksandar Jemcov, Marina Ćuk Đurović (2024)
    Tunel pod pritiskom, Unutrašnji pijezometri, Tranzijenti pritiska, Karstna izdan, Pukotinska izdan, Hidraulički odziv
    ... system for water drainage Tunn. Undergr. SpL. Tech. (2009) A. Mangin Pour une meilleure connaissance des systemes hydrologiques a partir des analyses corrćlatoire et spectrale J. Hydrol. (1984) J.Moon et ol. Effect of highly pervious geological features on ground-Water flow into a tunnel ...

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... Discussion 3.1. Selection of the Bacterial Isolates A total of 43 alkalophilic, sporogenic bacteria were subjected to physiological and metabolic analyses on different nutrient media and compared to ureolytic S. pasteurii DSM 33 and non-ureolytic reference B. pseudofirmus DSM 8715. In the past two decades ...
    ... badius, B. simplex, or B. chosinensis, while strain IV5 was recognized as Lysinibacillus sphaericus or L. fusiformis). Contrarily, the MALDI-TOF analyses were provided complete identification with a high score value for the best match. All tested bacteria belong to genera Bacillus, which were previously ...
    ... mediate precipitation during in vitro experiments [36]. According to Timperio et al. [37], MALDI-TOF analysis showed a high similarity with 16S rDNA analyses, suggesting the applicability for low-cost and rapid screening of bacteria from extreme environments. Since the MALDI-TOF identification is well-matched ...

  • Groundwater resources for drinking water supply in Serbia´s Southeast Pannonian basin

    Dušan Polomčić, Bojan Hajdin, Marina Ćuk, Petar Papić, Zoran Stevanović (2014)
    menadžment podzemnih voda, monitoring, kvalitet podzemnih voda, bilans, baza podataka

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... events and to increase the signal-to-noise ratios. The Raman study assisted in the identification of representative areas for additional local analyses. FTIR ATR spectra were recorded on powdered samples with an Alpha (Bruker Optics, Ettlingen, Germany) instrument equipped with Diamond ATR accessory; ...
    ... and to two other phases, namely iron oxide (sample d, spot 6) and calcium aluminosilicate (sample a, spot 8). Vibrational spectroscopic and XRPD analyses will allow the identification of the mineral phases in amounts more than ca. 1%. 3.2. Evidence of Asbestos Fibers Visual and optical microscopic ...
    ... , residues testifying to nondomestic, chemical and metallurgical uses in the case of these ceramics. A sorting, of useful shards for additional analyses can therefore be done on site, in museum reserves or on excavation sites. Author Contributions: Conceptualization, P.C.; methodologyy and validation ...

  • Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica

    Natalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel (2019)
    Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and Technology

  • Production information system of the Pljevlja coal mine

    Božo Kolonja, Ranka Stanković, Filip Vuković (2018)

  • Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)

    Dušan Polomčić, Dragoljub Bajić, Jelena Zarić (2015)
    A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...
    Water supply, Aquifer, Flow, Groundwater regime, Numerical modeling, Particle tracking
    ... riverine/bog sediments of the riverbed facies and floodplain facies, which constitute the Varoška Terrace deposits of the Würm age. Sedimentological analyses have shown that the riverine and lacustrine sediments were made of sands, silty sands and alevrites (sandy, rarely clayey and gravelly), while the ...
    ... floodplain facies, bog sediments, alluvia, and the youngest unit deposited since the Holocene – the beach facies of the Tisa River. Sedimentological analyses have shown that they were mostly made up of alevrites, sand, gravel and loess. HYDROGEOLOGICAL OVERVIEW A large number of wells (Figure 2) have ...

  • Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery

    Maja Milošević, Biljana Đorđević, Mihovil Logar (2020)
    калцит, сирова глина, традиционална керамика, Злакуса
    ... estimation of the mineral phases obtained by the whole-powder pattern fitting of the investigated samples is shown in . The SEM images and EDX analyses of the investigated CIMx and ClBd samples are shown in . Kaolinite occurs as lamel- lar hexagonal flakes with broken edges, while montmorillonite ...
    ... Maja Milošević, Mihovil Logar and Biljana Djordjević Daghmehchi M., Rathossi C., Omrani H., Emami M. & Rahbar M. (2018) Mineralogical and thermal analyses of the Hellenistic ceramics from Laodicea Temple, Iran. Applied Clay Science, 162, 146–154. De Oliveira Modesto C. & Bernardin A.M. (2008) De ...

  • Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

    Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)
    γ-spectrometry, brushite, chukhrovite, phosphogypsum, radionuclides, recrystallization
    ... mode, at an accelerating voltage of 20 kV and a probe current of ~0.1 nA. For SEM imaging, the samples were coated with gold. The EDS elemental analyses were conducted using low magnification (50x) on carbon-coated samples. Clay Minerals Raw phosphogypsum Dissolved gypsum + Residuum 1 ...
    ... corresponds to a pure white colour). An increase of the WI to 80.5% after the recrystallization is in accordance with the ICP-OES and SEM-EDS analyses, which showed a significantly smaller Fe content in the purified gypsum. This increase in the WI benefits the potential use of recrystallized p ...

  • FrameNet Lexical Database: Presenting a Few Frames Within the Risk Domain

    Aleksandra Marković, Ranka Stanković, Natalija Tomić, Olivera Kitanović (2021)
    U radu se daje kratak prikaz teorije semantike okvira, na kojoj je zasnovana leksička baza Frejmnet. Predstavljena je koncepcija ove mreže, kao i mogućnosti njene primene. Predstavljena je i leksička analiza koja se primenjuje u projektu izrade Frejmneta i ukazano na razlike između analize zasnovane na okviru u odnosu na analizu zasnovanu na reči. Zatim je prikazano nekoliko povezanih okvira koje prizivaju reči iz domena rizika. U radu je predstavljena i platforma NLTК pomoću koje se mogu koristiti ...
    Srpski jezik, semantika okvira, FrameNet, scenario rizika, rudarski korpus, obrada prirodnog jezika
    ... of the findings of these two distributional analyses, the authors concluded that there was no significant difference in the mean- ing of odredba in the corpora under examination and that the method of double clustering can be used in complex semantic analyses, which can then be represented through FrameNet ...
    ... and Hrstić 2020, 108). Infotheca Vol. 21, No. 1, September 2021 15 Marković A. et al., FrameNet Lexical Database. . . , pp. 7–33 posed the analyses done for the verb to risk and the noun risk in mono- lingual dictionaries and corpus data, they concluded that the dictionaries do not give a com ...

  • Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation

    Maja Franković, Nevenka Novaković, Vesna Matović (2015)
    The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...
    Krečnjak, mapiranje, Indeks raspadanja, brzina raspadanja, progresija
    ... Grainstone; (d—e) Algal rudstone; (f-g) Rudstone structurally different samples were taken from the Monu- ment for petrographic study. Petrographic analyses were performed on thin sections, using a Leica DMLSP micro- scope for polarized light that was connected to a Leica DC 300 digital camera. ...
    ... indices Were calculated. Results Lithological mapping Results of petrographic macroscopic observation in situ and microscopic microfacial analyses on built stone sam- ples reveal that three facies type of limestone were used for construction of the Dark Gate. The rocks are differentiated ...
    ... facades shows lower values of both damage indices types, than the calculated values for ecastern facades. Discussion Results of petrological analyses and lithological mapping of built stone blocks revealed the quantified distribution of three different microfacies of limestone (Fig.6). The ...

  • An intelligent hybrid system for surface coal mine safety analysis

    Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić (2010)

  • Understanding the effect of synthesis and sintering temperature on the functional properties of barium titanate/cobalt ferrite composites

    Marija Šuljagić, Aleksandar Kremenović, Ivan Petronijević, Adis Džunuzović, Miljana Mirković, Vladimir Pavlović, Ljubica Anđelković (2023)
    To investigate the effect of synthesis procedure and sintering temperature on the functional properties of perovskite/spinel ceramics, BaTiO3/CoFe2O4 composites were prepared by thermal decomposition, coprecipitation, and microemulsion method, and sintered at 1150°C and 1300°C. The phase composition and morphology of as-prepared powders as well as sintered ceramics were thoroughly examined by X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS). The dielectric and ferroelectric measurements were performed in detail. Generally, the ...
    Perovskite/spinel ceramics, Multiferroic, Sintering, Influence of synthesis method

  • Towards Better Valorisation of Industrial Minerals andRocks in Serbia—Case Study of Industrial Clays

    Vladimir Simić, Dragana Životić, Zoran Miladinović (2021)
    Management, Monitoring, Policy and Law,Nature and Landscape Conservation
    ... Serbia, access to land necessary for exploration/exploitation, current practise related to geological explo- ration including testing procedures and analyses, and actual standards for reporting of exploration results, mineral resources, and ore reserves in Serbia. The industrial clays were chosen as ...
    ... classifications of distances between investigative works are not prescribed, as well as analytical methods, nor the minimum number of re- quired tests/analyses. This was done intentionally, because it encourages intellectual work and development in the field of geological exploration, mining, and geostatistical ...
    ... Many of the manuals and papers in Russian [70,71] address the issue of testing clay deposits and emphasize the need to adapt testing methods and analyses to specific types of raw materials and deposits. Novel studies on the assessment of industrial clays give improved testing procedures and analytical ...

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... synthetic estimate. In this type of selection of the optimal artificial lift method, approaches based on the model of multiatributive and multi-criteria analyses are used, as well as those based on statistical data processing from engineering practice and expert systems. The selection of artificial lift methods ...
    ... synthetic estimate. In this type of selection of the optimal artificial lift method, approaches based on the model of multiatributive and multi-criteria analyses are used, as well as those based on statistical data processing from engineering practice and expert systems. The selection of artificial lift methods ...
    ... support. Conflicts of Interest: The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results. References 1. Naderi, A.; Ghayyem, M.A ...

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... hydrometeorological · time series, analyses, calculations, simulations and predictions of karst spring flow, application of hydrological models in karst, statistical methods in hydrogeology, regression and correlation analyses in karst hydrogeology, analyses of karst spring flow regime and balance ...
    ... reader will then study in more detail and take his own personal, often different, position. This task is someWhat easier when the foreword writer analyses and evaluates someone else's work. But, in this case, the writer is a direct participant and witness of the creation and work of the Centre for ...
    ... opportunity to stay at the Institute of ATOMKI twice, and got introduced with techniques of sample preparation and devices for making isotopic analyses. The cooperation continued in the following years, and during July 2021, experts from the ATOMKI Institute visited Serbia, that is, the karst terrains ...

  • Coupling of artificial intelligence methods in the development of hybrid intelligent systems

    Ranka Stanković, Ivan Obradović, Nikola Lilić (2001)
    In this paper we present an approach which couples various artificial intelligence (AI) methods in the solution of complex problems that cannot adequately be solved by a single AI method. We argue that the resulting, hybrid intelligent systems (HIS) can be successfully implemented with the use of available AI software libraries. Different coupling methods are analyzed and a classification of hybrid systems based on the chosen method is given. Two case studies of hybrid systems used in mining engineering ...
    hibridni inteligentni sistemi, spregnuti sistemi, metode veštačke inteligencije, rudarske primene veštačke inteligencije
    ... reliable prediction. Further extension of this system through an expert system which, on basis of the results obtained by the neural network, analyses and refines estimations and suggests activities for improving air protection on the analyzed locality, is in progress. Existing legal regulations ...

  • The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments

    Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)
    The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...
    sediments, Tisza River, organic matter, biomarkers, oil pollutants
    ... reservoir rocks.10,11 This feature of oil can be very useful in environmental chemistry for the determination of the source of pollution. Consequently, analyses of this type obtain a forensic character. In this paper, the surface sediments of the Tisza River, in the part of river flow from Kanjiža Town ...
    ... column was heated from 80 to 310 °C, at a rate of 2 °C min-1, and the final temperature of 310 °C was maintained for an additional 25 min. Detailed analyses of the target compounds were conducted using the following ion chromatograms: m/z = 71 (n-alka- nes and isoprenoids), m/z = 191 (terpanes) and m/z ...

  • The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector

    Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković (2020)
    Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...
    energetska bezbednost, prirodni gas, fazi AHP, AHP višekriterijumska analiza, fazi teorija
    ... sector for various combined projections of gas infrastructure development and natural gas consumption up to 2030. 4.1. Expert Analyses of Partial Indicator Expert analyses with questionnaires were provided for partial indicator administrative applicability (A1) and the indirect environment effect (E3) ...
    ... Center for Joint Research in Italy [30] and the global energy architecture performance index, proposed by the World Economy forum [31]. Multi-criteria analyses are another tool used to support decision-making [32–34]. These kinds of models can be used to analyze both qualitative and quantitative aspects of ...
    ... policies or scenarios and rank them individually according to their assessment and a set of predefined criteria. Various methods of multi-criteria analyses have so far been used to assess energy development scenarios: AHP (analytical hierarchy process), MAUT (multi-attribute utility theory), SMART (simple ...